采用分散剂对钛白粉进行了物理包覆,显著提升了钛白粉在水中的分散性能。同时,分析了钛白粉的自分散机理,并从产品应用的角度对其进行了系统评价,实验发现:经过分散剂表面包覆后粉体的Zeta(ζ)电位由-61.98 m V提升至-69.17 m V,分散液...采用分散剂对钛白粉进行了物理包覆,显著提升了钛白粉在水中的分散性能。同时,分析了钛白粉的自分散机理,并从产品应用的角度对其进行了系统评价,实验发现:经过分散剂表面包覆后粉体的Zeta(ζ)电位由-61.98 m V提升至-69.17 m V,分散液吸光值由0.102提升至0.358,沉降实验清水层明显减少,说明钛白粉的自分散性和分散稳定性得到提升;另外,采用改性钛白粉制备的色浆与未改性钛白粉制备的色浆相比分散剂用量由6%降至2%,放置黏度变化小,说明改性包覆能够实现粉体的自动解絮凝能力。展开更多
It was tried to prepare composite particles made of polymer and two kinds of solid powders by forming Pickeringemulsion followed by the drying-in-liquid method and to investigate how the stepwise addition of solid pow...It was tried to prepare composite particles made of polymer and two kinds of solid powders by forming Pickeringemulsion followed by the drying-in-liquid method and to investigate how the stepwise addition of solid powders affected the contained ratio and adhesion ratio of solid powders and the structure of composite particles. Limonene oil dissolving expanded polystyrene and ethylene glycol were adopted as the dispersed phase and the continuous phase, respectively. Magnetite and titanium dioxide were used as solid powders. Magnetite was added before or after formation of the (O/W) dispersion. Titanium dioxide was added at the various elapsed times from addition of magnetite. Titanium dioxide adhered only on the surface of composite particles irrespective of addition time. At the earlier addition of both solid powders, the surface-covering type composite particles were prepared. At the latter addition of titanium dioxide, a part of magnetite adhered on the surface and the remainder was dispersed into composite particle.展开更多
文摘采用分散剂对钛白粉进行了物理包覆,显著提升了钛白粉在水中的分散性能。同时,分析了钛白粉的自分散机理,并从产品应用的角度对其进行了系统评价,实验发现:经过分散剂表面包覆后粉体的Zeta(ζ)电位由-61.98 m V提升至-69.17 m V,分散液吸光值由0.102提升至0.358,沉降实验清水层明显减少,说明钛白粉的自分散性和分散稳定性得到提升;另外,采用改性钛白粉制备的色浆与未改性钛白粉制备的色浆相比分散剂用量由6%降至2%,放置黏度变化小,说明改性包覆能够实现粉体的自动解絮凝能力。
文摘It was tried to prepare composite particles made of polymer and two kinds of solid powders by forming Pickeringemulsion followed by the drying-in-liquid method and to investigate how the stepwise addition of solid powders affected the contained ratio and adhesion ratio of solid powders and the structure of composite particles. Limonene oil dissolving expanded polystyrene and ethylene glycol were adopted as the dispersed phase and the continuous phase, respectively. Magnetite and titanium dioxide were used as solid powders. Magnetite was added before or after formation of the (O/W) dispersion. Titanium dioxide was added at the various elapsed times from addition of magnetite. Titanium dioxide adhered only on the surface of composite particles irrespective of addition time. At the earlier addition of both solid powders, the surface-covering type composite particles were prepared. At the latter addition of titanium dioxide, a part of magnetite adhered on the surface and the remainder was dispersed into composite particle.
